1. National Traditional Sports Institute, Harbin Institute of Physical Education, Harbin, Heilongjiang 150008, China
2. Institute of Basic Theories of Traditional Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, China
3. Department of Taekwondo, Woosuk University, Jeonju 565701, Republic of Korea
4. Faculty of Education, City University of Macau, Macau 999078, China